ASTM A572 steel phaj yog nrov high-strength low alloy (HSLA) steel feem ntau siv nyob rau hauv cov qauv siv. A572 steel muaj cov tshuaj alloys uas txhim kho cov khoom hardness thiab muaj peev xwm los dais qhov hnyav, thiab cov khoom siv sib dua li cov hlau uas muaj cov khoom sib xws.
A572 steel phaj muaj nyob rau hauv tsib qib sib txawv: Qib 42, Qib 50, Qib 55, Qib 60 thiab Qib 65. Txhua qib muaj cov khoom sib txawv me ntsis thiab cov tshuaj muaj pes tsawg leeg, uas yuav ua rau lawv haum rau qee yam kev siv. Txawm li cas los xij, A 572-50 yog A572 chav kawm ntau tshaj plaws.
Tshuaj muaj pes tsawg leeg ntawm ASTM A572 GR.65 daim ntawv:
| Qib | C % | Si% | Mn% | P % | S % | V % | Ni% | Cov% |
| a572g 65 | 0.230 | 0.400 | 1.350 | 0.040 | 0.050 | 0.060 | 0.015 | 0.050 |
Mechanical zog ntawm ASTM A572 GR.65 Phaj:
| Qib | Thickness (hli) | Tsawg-yield (Mpa) | Tensile (MPa) | Elongation (%) |
| a572g 65 | 8mm -50 hli | 450 Mpa | 550 Mpa | 17% |
| 50mm -200 hli | 450 Mpa | 550 Mpa | 15% | |
| Lub min cuam tshuam lub zog yog longitudinal zog | ||||
